Why do some people with coronavirus get symptoms while others don't?
- Written by Abela Mahimbo, Lecturer in Public Health, University of Technology Sydney

SARS-CoV-2, the coronavirus which causes COVID-19, has infected almost 2.5 million people around the world and claimed 170,000 lives.
But some people don’t even get symptoms. Recent studies suggest as many as 80%or more of those infected are “silent carriers”, showing no or very mild symptoms.
It seems children and...